Debt (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Dec. 29, 2013	Sep. 29, 2013
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 2.1	$ 0.6
Long-term Debt, Gross	2,050.0	1,300.0
Long-term Debt, Fair Value	2,148.0	1,406.0
Long-term Debt, Carrying Value	2,047.9	1,299.4
Point Eight Seven Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Dec. 01, 2013
Debt Instrument, Face Amount	400.0	0
Stated interest rate	0.875%
Effective interest rate	0.941%
Debt Instrument, Maturity Date	Dec. 01, 2016
Six Point Two Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	550.0	550.0
Stated interest rate	6.25%
Effective interest rate	6.292%
Two Point Zero Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Dec. 01, 2013
Debt Instrument, Face Amount	350.0	0
Stated interest rate	2.00%
Effective interest rate	2.012%
Debt Instrument, Maturity Date	Dec. 01, 2018
Three Point Eight Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	750.0	750.0
Stated interest rate	3.85%
Effective interest rate	2.86%
Fair Value, Inputs, Level 2 [Member] | Point Eight Seven Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Fair value	398.0	0
Fair Value, Inputs, Level 2 [Member] | Six Point Two Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Fair value	642.0	644.0
Fair Value, Inputs, Level 2 [Member] | Two Point Zero Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Fair value	350.0	0
Fair Value, Inputs, Level 2 [Member] | Three Point Eight Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Fair value	$ 758.0	$ 762.0