Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Narrative) (Details)

v3.8.0.1
Fair Value Measurements (Narrative) (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Fair Value Disclosures [Abstract]    
Transfers from Level I to Level II $ 0  
Transfers from Level II to Level I 14,000,000  
Life insurance contracts and other non-majority owned investments, fair value $ 302,000,000 $ 279,000,000