Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Offsetting [Abstract]
Derivative asset, Gross amounts of recognized assets/liabilities	$ 7	$ 1
Derivative asset, Gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Net amounts of assets presented on the Consolidated Balance Sheet	7	1
Derivative asset, Gross amounts not offset on the Condensed Consolidated Balance Sheet, Financial instruments	(1)	(1)
Derivative asset, Gross amounts not offset on the Condensed Consolidated Balance Sheet, Collateral	(4)	0
Derivative assets, Net amount	2	0
Derivative assets with no offsetting arrangements	9	16
Total assets, Gross amounts of recognized assets/liabilities	16	17
Total assets, Net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	16	17
Total assets, Net amount	11	16
Derivative liabilities, Gross amounts of recognized assets/liabilities	1	5
Derivative liabilities, Gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Net amounts of liabilities presented on the Consolidated Balance Sheet	1	5
Derivative liabilities, Gross amounts not offset on the Condensed Consolidated Balance Sheet, Financial instruments	(1)	(1)
Derivative liabilities, Gross amounts not offset on the Condensed Consolidated Balance Sheet, Collateral	0	(1)
Derivative liabilities, Net amount	0	3
Derivative liabilities with no offsetting arrangements	46	28
Total liabilities, Gross amounts of recognized assets/liabilities	47	33
Total liabilities, Net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	47	33
Total liabilities, Net amount	$ 46	$ 31