Business Segment Financial Information (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Segment Reporting Information [Line Items]
Asset impairment and other charges, pre-tax amount	$ 129,165	$ 57,511	$ 59,740
Publishing
Segment Reporting Information [Line Items]
Asset impairment and other charges, pre-tax amount	32,000	27,000	36,000
Digital
Segment Reporting Information [Line Items]
Asset impairment and other charges, pre-tax amount	90,000		13,000
Broadcasting
Segment Reporting Information [Line Items]
Asset impairment and other charges, pre-tax amount			$ 9,000