Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 03, 2015	Mar. 28, 2014	Apr. 03, 2015	Mar. 28, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 166.5us-gaap_NetIncomeLoss	$ 76.9us-gaap_NetIncomeLoss	$ 361.7us-gaap_NetIncomeLoss	$ 171.4us-gaap_NetIncomeLoss
Other comprehensive income, net of tax
Foreign currency translation adjustment	0.8	0	(3.0)	0
Comprehensive income	$ 167.3us-gaap_ComprehensiveIncomeNetOfTax	$ 76.9us-gaap_ComprehensiveIncomeNetOfTax	$ 358.7us-gaap_ComprehensiveIncomeNetOfTax	$ 171.4us-gaap_ComprehensiveIncomeNetOfTax

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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