Equity Units (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 04, 2021	Dec. 31, 2020
Equity Units Disclosure [Line Items]
Accretion Expense	$ 5
Equity Unit, Shares Issued	10,430,500
Preferred Stock, Shares Issued	1,043,050
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Preferred Stock, Dividend Rate, Percentage	0.00%
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share	$ 100
Forward Contract Indexed to Issuer's Equity, Interest Rate	6.875%
Forward Contract Indexed to Issuer's Equity, Shares	57,215,465
Shares Issued, Price Per Share			$ 25.88
Forward Contract Indexed to Issuer's Equity, Maximum Settlement Rate	3.864
Forward Contract Indexed to Equity, Settlement, Cash, Amount	$ 1,000
Forward Contract Indexed to Issuer's Equity, Present Value of Interest Payments	$ 205
Preferred Shares Deliverable Upon Early Settlement of Purchase Contracts	85.00%
Corporate Unit, Notional Value	$ 1,043
Preferred Stock, Value, Issued	$ 1,043			$ 0
Preferred Stock, Convertible, Conversion Price	$ 31.70
Preferred Stock , Convertible, Initial Conversion Rate	$ 31.5428
Preferred Stock, Redemption Percentage	100.00%
Preferred Stock, Beneficial Ownership Interest in One Share	10.00%
Corporate Equity Unit, Stated Value per Share	$ 100
Issuance of preferred stock	$ 1,015	$ 0
Proceeds from Equity Units, net of underwriting costs and commissions, before offering expenses	$ 1,000