Debt - Exit Credit Facility (Details)		12 Months Ended
	Jun. 28, 2020 USD ($)	Dec. 31, 2020 USD ($)	Feb. 09, 2021	Feb. 02, 2021 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Debt, principal		$ 9,095,000,000			$ 8,916,000,000
Chesapeake revolving credit facility
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity		$ 4,000,000,000.0
Chesapeake revolving credit facility | London interbank offered rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		2.50%
Chesapeake revolving credit facility | London interbank offered rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		3.50%
Credit facility | Chesapeake revolving credit facility
Debt Instrument [Line Items]
Debt, principal		$ 1,929,000,000			$ 1,590,000,000
Credit facility | Exit credit facility
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity	$ 2,500,000,000
LIBOR Floor	1.00%
First lien leverage ratio	2.75
Leverage ratio	3.50
Current ratio	1.00
Unused capacity, commitment fee percentage	0.50%
Credit facility | Exit credit facility | Subsequent event
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity				$ 2,500,000,000
Credit facility | Exit credit facility | Minimum
Debt Instrument [Line Items]
Asset coverage ratio	1.50
Credit facility | Exit credit facility | Letter of Credit
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity	$ 200,000,000.0
Credit facility | Exit credit facility | Letter of Credit | Alternative Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Credit facility | Exit credit facility | Letter of Credit | Alternative Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Credit facility | Exit credit facility | Letter of Credit | London interbank offered rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Credit facility | Exit credit facility | Letter of Credit | London interbank offered rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	4.25%
Credit facility | Revolving Tranche A | Subsequent event
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity				1,750,000,000
Credit facility | Revolving Tranche A | Chesapeake revolving credit facility
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity	$ 1,750,000,000
Term	3 years
Credit facility | Tranche B Loans
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity	$ 220,000,000
Term	4 years
Credit facility | Tranche B Loans | Subsequent event
Debt Instrument [Line Items]
Revolving credit, maximum borrowing capacity				220,000,000
Senior notes | 5.5% Senior Notes due 2026 | Subsequent event
Debt Instrument [Line Items]
Debt, principal				$ 500,000,000
Interest rate, stated percentage			5.50%	5.50%
Senior notes | 5.875% Senior Notes due 2029 | Subsequent event
Debt Instrument [Line Items]
Debt, principal				$ 500,000,000
Interest rate, stated percentage			5.875%	5.875%