Subsequent Events - Additional Information (Detail) - USD ($)		3 Months Ended			9 Months Ended		12 Months Ended
	Oct. 25, 2019	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Aug. 31, 2019
Subsequent Event [Line Items]
Revenue			$ 2,450,600,000	$ 2,548,700,000	$ 6,738,500,000	$ 7,061,100,000	$ 9,648,800,000
Operating loss			634,800,000	7,835,100,000	345,700,000	7,681,200,000	7,606,400,000
Impairment charges			834,900,000	$ 8,133,700,000	837,800,000	$ 8,165,300,000	8,323,300,000
Assets			16,010,200,000		16,010,200,000		17,722,400,000
Liabilities			11,841,700,000		11,841,700,000		$ 12,469,200,000
Interest rate								3.85%
Quickie Business
Subsequent Event [Line Items]
Revenue			118,000,000		353,000,000
Operating loss			223,000,000		270,000,000
Impairment charges			237,000,000		311,000,000
Assets			683,000,000		683,000,000
Liabilities			$ 194,000,000		$ 194,000,000
Subsequent Event | Senior notes
Subsequent Event [Line Items]
Interest rate	5.00%
Debt Instrument, face amount	$ 300,000,000
Redemption price percentage	102.50%
Subsequent Event | Quickie Business
Subsequent Event [Line Items]
Depreciation and amortization expense		$ 16,000,000