Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	May 27, 2012	May 29, 2011
Assets:
Derivative assets	$ 58.7	$ 71.5
Available-for-sale securities	1.6	1.7
Deferred compensation assets	5.8	7.4
Total assets	66.1	80.6
Liabilities:
Derivative liabilities	215.4	92.2
Deferred and share-based compensation liabilities	27.1	29.1
Total liabilities	242.5	121.3
Level 1 [Member]
Assets:
Derivative assets	13.8	16.3
Available-for-sale securities	1.6	1.7
Deferred compensation assets	5.8	7.4
Total assets	21.2	25.4
Liabilities:
Deferred and share-based compensation liabilities	27.1	29.1
Total liabilities	27.1	29.1
Level 2 [Member]
Assets:
Derivative assets	44.9	55.2
Total assets	44.9	55.2
Liabilities:
Derivative liabilities	215.4	92.2
Total liabilities	215.4	92.2
Level 3 [Member]
Assets:
Derivative assets
Available-for-sale securities
Deferred compensation assets
Total assets
Liabilities:
Derivative liabilities
Deferred and share-based compensation liabilities
Total liabilities