Consolidated Statements of Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock [Member]		Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI [Member]	[2]
Beginning balance, shares at Mar. 31, 2018			127.9	[1]			46.6
Beginning balance at Mar. 31, 2018		$ 3,457.4	$ 1.3	[1]	$ 2,383.4	$ 5,752.2	$ (4,581.0)	$ (98.5)
Comprehensive Income
Net income		399.3				399.3
Other comprehensive loss		(2.8)						(2.8)
Total comprehensive income		396.5
Dividends declared		(150.1)				(150.1)
Repurchases of common stock, shares							3.5
Repurchases of common stock		(431.9)					$ (431.9)
Stock-based compensation		65.3			65.3
Shares issued pursuant to stock-based compensation plans, shares	[1]		0.9
Shares issued pursuant to stock-based compensation plans		21.8	$ 0.0	[1]	21.8
Cumulative adjustment from adoption of new accounting standards		(5.1)				(5.1)
Ending balance, shares at Dec. 29, 2018			128.8	[1]			50.1
Ending balance at Dec. 29, 2018		3,353.9	$ 1.3	[1]	2,470.5	5,996.3	$ (5,012.9)	(101.3)
Beginning balance, shares at Sep. 29, 2018			128.8	[1]			48.3
Beginning balance at Sep. 29, 2018		3,462.0	$ 1.3	[1]	2,448.0	5,925.4	$ (4,804.9)	(107.8)
Comprehensive Income
Net income		120.0				120.0
Other comprehensive loss		6.5						6.5
Total comprehensive income		126.5
Dividends declared		(49.1)				(49.1)
Repurchases of common stock, shares							1.8
Repurchases of common stock		(208.0)					$ (208.0)
Stock-based compensation		22.5			22.5
Ending balance, shares at Dec. 29, 2018			128.8	[1]			50.1
Ending balance at Dec. 29, 2018		3,353.9	$ 1.3	[1]	2,470.5	5,996.3	$ (5,012.9)	(101.3)
Beginning balance, shares at Mar. 30, 2019			128.8	[1]			50.7
Beginning balance at Mar. 30, 2019		3,287.2	$ 1.3	[1]	2,493.8	5,979.1	$ (5,083.6)	(103.4)
Comprehensive Income
Net income		633.3				633.3
Other comprehensive loss		(15.2)						(15.2)
Total comprehensive income		618.1
Dividends declared		(155.1)				(155.1)
Repurchases of common stock, shares							5.3
Repurchases of common stock		(542.1)					$ (542.1)
Stock-based compensation		72.9			72.9
Shares issued pursuant to stock-based compensation plans, shares	[1]		0.9
Shares issued pursuant to stock-based compensation plans		0.0	$ 0.0	[1]	0.0
Cumulative adjustment from adoption of new accounting standards		(164.5)				(164.5)
Ending balance, shares at Dec. 28, 2019			129.7	[1]			56.0
Ending balance at Dec. 28, 2019		3,116.5	$ 1.3	[1]	2,566.7	6,292.8	$ (5,625.7)	(118.6)
Beginning balance, shares at Sep. 28, 2019			129.7	[1]			55.1
Beginning balance at Sep. 28, 2019		2,913.6	$ 1.3	[1]	2,544.6	6,009.4	$ (5,526.3)	(115.4)
Comprehensive Income
Net income		334.1				334.1
Other comprehensive loss		(3.2)						(3.2)
Total comprehensive income		330.9
Dividends declared		(50.7)				(50.7)
Repurchases of common stock, shares							0.9
Repurchases of common stock		(99.4)					$ (99.4)
Stock-based compensation		22.1			22.1
Ending balance, shares at Dec. 28, 2019			129.7	[1]			56.0
Ending balance at Dec. 28, 2019		$ 3,116.5	$ 1.3	[1]	$ 2,566.7	$ 6,292.8	$ (5,625.7)	$ (118.6)

[1] Includes Class A and Class B common stock.

[2] Accumulated other comprehensive income (loss).