Goodwill and Other Intangible Assets - Changes in Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortizing Intangible Assets, Ending Balance	$ 270	$ 342	$ 355
Impairment of Intangible Assets, Finite-lived	0	0
Finite-Lived Intangible Assets, Transferred To Assets Held-For-Sale	(1)	0
Finite-lived Intangible Assets Acquired	0	0
Amortizing Intangible Assets, Other	0	0
Amortizing Intangible Assets, Beginning Balance	342	355
Other Non-Amortizing Intangible Assets, Beginning Balance	2,635	1,254
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	(61)	(21)
Goodwill, Written off Related to Sale of Business Unit	(10)	0
Indefinite-lived Intangible Assets Acquired	0	20
Indefinite-lived Intangible Assets, Period Increase (Decrease)	(10)	(8)
Other Non-Amortizing Intangible Assets, Ending Balance	2,554	2,635	1,254
Intangible assets other than goodwill, Beginning Balance	2,977	1,609
Impairment of Intangible Assets (Excluding Goodwill)	(61)	(21)
Amortization expense	(71)	(68)	(67)
Indefinite-lived Intangible Assets, Other Charges	(11)	0
Intangible Assets Acquired	0	20
Increase (Decrease) in Intangible Assets, Current	(10)	(8)
Intangible assets other than goodwill, Ending Balance	2,824	2,977	$ 1,609
Centaur Holdings, LLC
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	0	55
Indefinite-lived Intangible Assets Acquired	0	1,390
Intangible assets other than goodwill	0	$ 1,445
Other U.S.
Finite-Lived Intangible Assets [Line Items]
Reporting Unit, Zero or Negative Carrying Amount, Amount of Allocated Goodwill	$ 81