Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			$ (278.0)
Other comprehensive income (loss) before reclassifications, net of tax			35.6
Amounts reclassified into net income, net of tax			14.8
Other comprehensive income, net of tax	97.4	53.4	50.4	23.0
Balance at end of the period	(227.6)		(227.6)
Net Gain (Loss) on Derivative Instruments Designated as Cash Flow and Firm Commitment Hedges
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			(2.0)
Other comprehensive income (loss) before reclassifications, net of tax			0.2
Amounts reclassified into net income, net of tax			(0.4)
Other comprehensive income, net of tax			(0.2)
Balance at end of the period	(2.2)		(2.2)
Net Actuarial Gain (Loss), Prior Service Cost and Transition Assets, Less Amortization
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			(456.5)
Other comprehensive income (loss) before reclassifications, net of tax			57.3
Amounts reclassified into net income, net of tax			4.4
Other comprehensive income, net of tax			61.7
Balance at end of the period	(394.8)		(394.8)
Foreign Currency Translation Adjustment
Changes in Accumulated other comprehensive loss (net of tax)
Balance at beginning of the period			180.5
Other comprehensive income (loss) before reclassifications, net of tax			(21.9)
Amounts reclassified into net income, net of tax			10.8
Other comprehensive income, net of tax			(11.1)
Balance at end of the period	$ 169.4		$ 169.4