Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (243)	$ (237)
Gross Carrying Amount	586	625
Net Other Intangible Assets	343	388
Licenses
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	25	28
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	223	223
Accumulated Amortization	(160)	(126)
Net Other Intangible Assets	63	97
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	220	220
Accumulated Amortization	0	0
Net Other Intangible Assets	220	220
VOBA
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	105	141
Accumulated Amortization	(71)	(99)
Net Other Intangible Assets	34	42
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13	13
Accumulated Amortization	(12)	(12)
Net Other Intangible Assets	$ 1	$ 1