Stock Repurchase Program - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	266 Months Ended
	Oct. 07, 2019	Mar. 13, 2020	Feb. 15, 2020	Feb. 09, 2019	Feb. 09, 2019	Feb. 15, 2020	Feb. 15, 2020
Equity, Class of Treasury Stock [Line Items]
Stock repurchased cumulative, shares			267,000	422,000	1,076,000	669,967	147,500,000
Purchase of treasury stock					$ 847,097,000	$ 764,846,000	$ 22,188,000,000
Increase in authorization of stock repurchase, value	$ 1,250,000,000
Stock repurchase authorized	$ 23,150,000,000
Remaining value authorized for share repurchases			$ 961,900,000			961,900,000	$ 961,900,000
Retirement of treasury shares			0	$ 0	0	0
Retained Deficit [Member]
Equity, Class of Treasury Stock [Line Items]
Retirement of treasury shares			1,878,595,000	1,706,972,000	1,706,972,000	1,878,595,000
Additional Paid-In Capital [Member]
Equity, Class of Treasury Stock [Line Items]
Retirement of treasury shares			$ 99,686,000	$ 125,442,000	$ 125,442,000	$ 99,686,000
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Share of treasury stock retired			1,912,000	2,563,000	2,563,000	1,912,000
Retirement of treasury shares			$ 19,000	$ 26,000	$ 26,000	$ 19,000
Subsequent Events [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchased cumulative, shares		156,035
Purchase of treasury stock		$ 166,100,000