Quarterly report pursuant to Section 13 or 15(d)

Leases - ROU Assets and Liabilities (Details)

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Leases - ROU Assets and Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Assets    
Operating Lease, Right-of-Use Asset $ 1,339 $ 1,311
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other long-term assets Other long-term assets
Liabilities    
Short-term (recorded within accounts payable and accrued expenses) $ 204 $ 204
Long-term (recorded within other long-term liabilities) 1,367 1,334
Total lease liabilities $ 1,571 $ 1,538
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accounts payable and accrued expenses Accounts payable and accrued expenses
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other long-term liabilities Other long-term liabilities