Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 252		$ 252		$ 72
Goodwill, Impaired, Accumulated Impairment Loss	0		0		0
Indefinite-Lived Intangible Assets Acquired			350
Finite-Lived Intangible Assets, Net	222		222		97
Finite-Lived Intangible Assets, Accumulated Amortization	1,082		1,082		1,057
Finite-Lived Intangible Assets, Gross	1,304		1,304		1,154
Intangible Assets, Net (Excluding Goodwill)	572		572		97
Intangible Assets, Gross (Excluding Goodwill)	1,654		1,654		1,154
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets Acquired			350
Finite-Lived Intangible Assets, Net	222		222		97
Finite-Lived Intangible Assets, Accumulated Amortization	1,082		1,082		1,057
Finite-Lived Intangible Assets, Gross	1,304		1,304		1,154
Amortization of Intangible Assets	10	$ 10	27	$ 33
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	14		14
Finite-Lived Intangible Asset, Expected Amortization, Year One	41		41
Finite-Lived Intangible Asset, Expected Amortization, Year Two	26		26
Finite-Lived Intangible Asset, Expected Amortization, Year Three	17		17
Finite-Lived Intangible Asset, Expected Amortization, Year Four	12		12
Finite-Lived Intangible Asset, Expected Amortization, Year Five	11		11
Amortization of Intangible Assets	10	$ 10	27	$ 33
Contractual Rights
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	131		131		0
Finite-Lived Intangible Assets, Accumulated Amortization	551		551		550
Finite-Lived Intangible Assets, Gross	682		$ 682		550
Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			20 years
Finite-Lived Intangible Assets, Net	131		$ 131		0
Finite-Lived Intangible Assets, Accumulated Amortization	551		551		550
Finite-Lived Intangible Assets, Gross	682		682		550
Customer Lists
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	25		25		30
Finite-Lived Intangible Assets, Accumulated Amortization	109		109		104
Finite-Lived Intangible Assets, Gross	134		$ 134		134
Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			20 years
Finite-Lived Intangible Assets, Net	25		$ 25		30
Finite-Lived Intangible Assets, Accumulated Amortization	109		109		104
Finite-Lived Intangible Assets, Gross	134		134		134
Computer Software, Intangible Asset
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	66		66		67
Finite-Lived Intangible Assets, Accumulated Amortization	422		422		403
Finite-Lived Intangible Assets, Gross	488		$ 488		470
Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			3 years
Finite-Lived Intangible Assets, Net	66		$ 66		67
Finite-Lived Intangible Assets, Accumulated Amortization	422		422		403
Finite-Lived Intangible Assets, Gross	$ 488		488		$ 470
Customer Lists
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangible Assets Acquired			345
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets Acquired			345
Contractual Rights
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangible Assets Acquired			5
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets Acquired			$ 5