Combined and Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Common Stock	Treasury Stock	Parent Company's Equity Investment	Additional Paid-in (Distributed) Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at the beginning of the period at May. 25, 2014			$ 1,244.3			$ 20.7	$ 1,265.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			268.3				268.3
Net transactions with parent			(148.3)				(148.3)
Increase in redemption value of noncontrolling interests in excess of earnings allocated			1.7				1.7
Unrealized pension and post-employment benefit obligations						2.9	2.9
Unrealized currency translation losses						(28.7)	(28.7)
Balance at the end of the period at May. 31, 2015			1,362.6			(5.1)	1,357.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			285.3				285.3
Net transactions with parent			(233.3)				(233.3)
Increase in redemption value of noncontrolling interests in excess of earnings allocated			4.8				4.8
Reclassification of pension and post-retirement benefits out of accumulated other comprehensive income (loss)						(4.0)	(4.0)
Unrealized pension and post-employment benefit obligations						5.4	5.4
Unrealized currency translation losses						(5.5)	(5.5)
Balance at the end of the period at May. 29, 2016			1,409.8			(9.2)	1,400.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			151.1		$ 175.8		326.9
Issuance of common stock at separation	$ 146.0			$ (146.0)
Issuance of common stock at separation (in shares)	146,046,395
Non-cash debt exchange			(1,542.9)				(1,542.9)
Cash distribution to Conagra at Separation			(823.5)				(823.5)
Net transactions with parent			806.0	(762.0)			44.0
Increase in redemption value of noncontrolling interests in excess of earnings allocated			$ 0.5	1.6			2.1
Unrealized pension and post-employment benefit obligations						1.0	1.0
Unrealized currency translation losses						(1.1)	(1.1)
Common stock dividends declared					(54.8)		(54.8)
Exercise of stock options, issuance of other stock awards	$ 0.1	$ (0.2)		0.5			0.4
Exercise of stock options, issuance of other stock awards (in shares)	34,506
Stock-based compensation expense after Separation				4.1			4.1
Other				0.2			0.2
Balance at the end of the period at May. 28, 2017	$ 146.1	$ (0.2)		$ (904.8)	$ 121.0	$ (9.3)	$ (647.2)
Balance at the end of the period (in shares) at May. 28, 2017	146,080,901						146,080,901