Earnings Per Share - Summary of Basic and Diluted EPS (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended				15 Months Ended
	Jun. 30, 2013		Jun. 30, 2013		Jul. 01, 2012		Jul. 01, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Preferred Stock Dividends, Income Statement Impact	$ (28.0)		$ (33.1)
Preferred Stock, Accretion of Redemption Discount	(12.0)		(36.3)
Preferred Stock Conversions, Inducements	52.6		81.9
Dilutive Adjustments To Income Loss Attributable To Common Stock From Assumed Conversion Of Preferred Stock Net Of Tax	12.6		12.5
Net income (loss) attributable to common and participating preferred stockholders	91.6		108.1		(129.2)		(149.1)
Participating shares at end of period:
Common shares outstanding	140,576		140,576		139,357		139,357
Preferred shares (as-converted basis)	61,987		61,987		62,526		62,526
Total	202,563		202,563		201,883		201,883
Percentage of income (loss) allocated to:
Common shares	69.40%		69.40%		100.00%		100.00%
Preferred shares (a)	30.60%	[1]	30.60%	[1]	0.00%	[1]	0.00%	[1]
Net income (loss) attributable to common shares - basic	63.6		75.0		(129.2)		(149.1)
Dilutive adjustments to income (loss) attributable to common shares from assumed conversion of preferred shares, net of tax:
Net income (loss) attributable to common shares - diluted	$ 51.0		$ 62.5		$ (129.2)		$ (149.1)
Weighted-average common shares outstanding - basic	140,292		139,832		139,351		139,349
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock	62,413		62,555
Dilutive effect of unvested restricted stock and restricted stock units	1,853		2,231
Dilutive effect of stock options	662		612
Weighted-average shares outstanding - diluted	205,220		205,230		139,351		139,349
Net income (loss) per common share attributable to controlling interest:
Basic (in dollars per share)	$ 0.45		$ 0.54		$ (0.93)		$ (1.07)
Diluted (in dollars per share)	$ 0.25		$ 0.30		$ (0.93)		$ (1.07)

[1] Losses are not allocated to the convertible participating preferred shares since they have no contractual obligation to share in such losses.